Olarerin-George AO, Hogenesch JB.

Nucleic Acids Res. 2015 Mar 11;43(5):2535-42. doi:10.1093/nar/gkv136

Assessing the prevalence of mycoplasma contamination in cell culture via a survey of NCBI's RNA-seq archive.

Most reads align to rRNA. Found contamination in a single-cell dataset (Smart-Seq2).